[PATCH] audit signal recipients

When auditing syscalls that send signals, log the pid and security
context for each target process. Optimize the data collection by
adding a counter for signal-related rules, and avoiding allocating an
aux struct unless we have more than one target process. For process
groups, collect pid/context data in blocks of 16. Move the
audit_signal_info() hook up in check_kill_permission() so we audit
attempts where permission is denied.

Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

5 files changed, 45 insertions, 0 deletions

diff --git a/arch/ia64/kernel/audit.c b/arch/ia64/kernel/audit.c
index 538312adc53b..f3802ae89b10 100644
--- a/arch/ia64/kernel/audit.c
+++ b/arch/ia64/kernel/audit.c
@@ -28,6 +28,15 @@ static unsigned signal_class[] = {
 ~0U
 };
 
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_IA32_SUPPORT
+        if (arch == AUDIT_ARCH_I386)
+                return 1;
+#endif
+        return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_IA32_SUPPORT
diff --git a/arch/powerpc/kernel/audit.c b/arch/powerpc/kernel/audit.c
index 66d54bada0bf..a4dab7cab348 100644
--- a/arch/powerpc/kernel/audit.c
+++ b/arch/powerpc/kernel/audit.c
@@ -28,6 +28,15 @@ static unsigned signal_class[] = {
 ~0U
 };
 
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_PPC64
+        if (arch == AUDIT_ARCH_PPC)
+                return 1;
+#endif
+        return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_PPC64
diff --git a/arch/s390/kernel/audit.c b/arch/s390/kernel/audit.c
index 7affafe626d2..d1c76fe10f29 100644
--- a/arch/s390/kernel/audit.c
+++ b/arch/s390/kernel/audit.c
@@ -28,6 +28,15 @@ static unsigned signal_class[] = {
 ~0U
 };
 
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_COMPAT
+        if (arch == AUDIT_ARCH_S390)
+                return 1;
+#endif
+        return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_COMPAT
diff --git a/arch/sparc64/kernel/audit.c b/arch/sparc64/kernel/audit.c
index d57a9dad0ab7..24d7f4b4178a 100644
--- a/arch/sparc64/kernel/audit.c
+++ b/arch/sparc64/kernel/audit.c
@@ -28,6 +28,15 @@ static unsigned signal_class[] = {
 ~0U
 };
 
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_SPARC32_COMPAT
+        if (arch == AUDIT_ARCH_SPARC)
+                return 1;
+#endif
+        return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_SPARC32_COMPAT
diff --git a/arch/x86_64/kernel/audit.c b/arch/x86_64/kernel/audit.c
index b970de66ee59..06d3e5a14d9d 100644
--- a/arch/x86_64/kernel/audit.c
+++ b/arch/x86_64/kernel/audit.c
@@ -28,6 +28,15 @@ static unsigned signal_class[] = {
 ~0U
 };
 
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_IA32_EMULATION
+        if (arch == AUDIT_ARCH_I386)
+                return 1;
+#endif
+        return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_IA32_EMULATION